physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
Drifting...relaxing...deeply relaxed...serene...calm... Sometimes biting the inside of the mouth occurs because the surfaces on inside of the lips and cheeks do not feel smooth. The rough surfaces are caused by biting the inside of the mouth. Biting the inside of the mouth causes this problem rather than relieves it.